 #include <stdio.h>
   /* print Fahrenheit-Celsius table
       for fahr = 0, 20, ..., 300; floating-point version */
   void main()
   {
	   //int celsius;
     float fahr ,celsius;//fahr, celsius;
     float lower, upper, step;
     lower = 0;      /* lower limit of temperatuire scale */
     upper = 300;    /* upper limit */
     step = 20;      /* step size */
     fahr = lower;
	 printf("%s \t %s\n", "fahr", "celsius");
     while (fahr <= upper) {
         celsius = (5.0/9.0) * (fahr-32.0);//<----5.0,9.0
         printf("%3.0f \t %6.1f\n", fahr, celsius);//<--%3.0f
         fahr = fahr + step;
     }
	 
   }